21019075

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 33212160

約数和(自身を除く): 12193085

約数列:

[1, 5, 7, 11, 25, 35, 55, 61, 77, 175, 179, 275, 305, 385, 427, 671, 895, 1253, 1525, 1925, 1969, 2135, 3355, 4475, 4697, 6265, 9845, 10675, 10919, 13783, 16775, 23485, 31325, 49225, 54595, 68915, 76433, 117425, 120109, 272975, 344575, 382165, 600545, 840763, 1910825, 3002725, 4203815, 21019075]

約数ペア:

[(1, 21019075), (5, 4203815), (7, 3002725), (11, 1910825), (25, 840763), (35, 600545), (55, 382165), (61, 344575), (77, 272975), (175, 120109), (179, 117425), (275, 76433), (305, 68915), (385, 54595), (427, 49225), (671, 31325), (895, 23485), (1253, 16775), (1525, 13783), (1925, 10919), (1969, 10675), (2135, 9845), (3355, 6265), (4475, 4697)]